This guide will let out know how to get Cactus Flesh in No man’s Sky.
The first two ways you can get cactus flesh is by making it by putting oxygen and pyrite into a refiner and you will receive pyrite. Or if you already have cactus flesh, then you can put cactus flesh and pyrite into a refiner and you will get more cactus flesh out of it.
The other way that you can get cactus flesh is by simply finding them in the wild on planets, you can find them on desert-like planets/planets with a desert environment. If your system does not have a planet like that, then you have to switch systems until you find one with a desert planet on it.
Once you get on a planet with cactus flesh on it, you have to look for Echniocactus, which you can see on your analysis visor and when you harvest them using the Haz Mat glove you will get cactus flesh.